30 Years of the Digest ... founded August 21, 1981
The Telecom Digest for September 10, 2011
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Date: Fri, 9 Sep 2011 23:58:32 +0000 (UTC) From: David Scheidt <firstname.lastname@example.org> To: email@example.com. Subject: Re: "Next Bus" telephone information system Message-ID: <firstname.lastname@example.org> HAncock4 <email@example.com> wrote: :The New York City Transit Authority has introduced a new telephone :"app" that tells riders waiting at a bus stop when the next bus will :come, using real time information. I'm impressed by it since it :requires only a regular Touch Tone telephone, not any kind of 'smart :phone', and that the information is in real time (where the buses are :actually physically located), as opposed to using merely the schedule, :as older applications used to do. Surface buses are subject to :traffic delays that disrupt schedules. :Passengers simply dial the number, then enter the specific bus stop :code (posted on the bus stop sign). The CTA (Chicago) has had a similar system in place for a couple years. It works via text message, web site http://ctabustracker.com/bustime, and cell phone apps. The user sends a text message to a set short code, with a code from the sign. The response tells you the next two buses for all routes that serve the stop at that time of day. The website shows more, and has a feature that shows were buses actually are. It's reasonably accurate, with better accuracy te sooner the bus will get there. I've noticed that the accuracy is poor for westbound buses close to the lake -- most of the east-west routes have the eastbound bus make a loop, and become the west-bound bus, and the prediction for that part of the route is very poor. I'm not sure if they're just using a time based on the schedule, and ignoring the eastbound bus is late, or what. The TouchTone system is an interesting modification. -- sig 71
Date: Fri, 9 Sep 2011 20:20:26 -0700 (PDT) From: HAncock4 <firstname.lastname@example.org> To: email@example.com. Subject: Re: "Next Bus" telephone information system Message-ID: <firstname.lastname@example.org> On Sep 9, 7:58~pm, David Scheidt <dsche...@panix.com> wrote: > The CTA (Chicago) has had a similar system in place for a couple > years. ~It works via text message, web site > http://ctabustracker.com/bustime, and cell phone apps. ~The user > sends a text message to a set short code, with a code from the sign. > The response tells you the next two buses for all routes that serve > the stop at that time of day. ~The website shows more, and has a > feature that shows were buses actually are. ~ SEPTA recently added a webpage that shows a map where the buses of a given route are located, using GPS from the buses. However, there is an uneven delay in reporting of several minutes and sometimes the buses are unable to report properly. http://www3.septa.org/transitview/ SEPTA is adding apps for cell phone users. see "real time" under www.septa.org
Date: 9 Sep 2011 14:56:32 -0400 From: email@example.com (Scott Dorsey) To: firstname.lastname@example.org. Subject: Re: Does SMS messaging keep going when cellular voice is down? Message-ID: <email@example.com> In article <firstname.lastname@example.org>, Bill Horne <bill@horneQRM.net> wrote: >I just read an email that claims cell phone text messaging (SMS) keeps >going when cellular voice service is down. Please tell me if this is >true or not. Well, it depends why the voice service is down. If it's down because too many people are trying to make calls in the same area and clogging up the links between towers, then lower bandwidth SMS messages are apt to go through even when you cannot get a call through. If it's down because there's no power to the tower, or a storm blew it over, or for some other reason the handset cannot get a connection to the tower, then indeed SMS messages won't go through any more than phone calls. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis."
Date: Thu, 8 Sep 2011 23:47:08 -0700 From: "W" <email@example.com> To: firstname.lastname@example.org. Subject: Fuse Panel Recommendation Message-ID: <Tvednb9m_4u_K_TTnZ2dnUVZ5tOdnZ2d@giganews.com> Can someone recommend a -48V DC fuse panel for a telecom rack that would meet two requirements: - let us manually configure the fuse or circuit breaker for each piece of equipment, up to 30A per box (most equipment would be at or under 20A) - show a spot reading of the total amps in current use across all devices that go through the fuse panel that are currently powered on -- W
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